How do you replace fan belt c220 mercedes year 2000?

To replace the fan belt on a 2000 Mercedes C220, first, ensure the engine is off and cool. Release tension from the belt using the tensioner pulley, often by turning it with a wrench or ratchet. Remove the old belt by sliding it off the pulleys, then install the new belt following the correct routing diagram usually found on a sticker in the engine bay. Finally, reapply tension to the belt and double-check its alignment before starting the engine.